Buy a junk car, restore it, sell it, then collect rarer vehicles
That broad loop is the reliable starting point. Exact car names, parts, prices, controls, stats, and unlock paths are not available in the approved material.
This is a clearly unofficial Junk Mechanics wiki index. It covers supported basics only; check the Trello, Discord, and official-wiki status page for the dated finding that no creator-confirmed official wiki was found.
If you are starting now, follow the beginner guide. If you are deciding whether to sell, use the money checklist with information visible in your own session.
If you want a car list or best car, open Cars or the goal guide. Both explain what can be answered without inventing vehicle details.
Current facts: restoration, repainting, selling for cash, limited-time codes, and collecting rarer vehicles are supported at a broad level; named cars, exact prices, and unlock requirements remain unavailable.